This invention discloses a ground-to-UAV
secure transmission evaluation method based on a Poisson random point process. The method includes: first, establishing an air-to-ground uplink
relay transmission system model containing a ground source, UAV
relay,
satellite, and eavesdropper; distributing the eavesdropper and
satellite in a ground hemispherical region and a dual-altitude concentric spherical
orbit shell, respectively, based on a Poisson random point process; then configuring realistic
channel models for the RF and FSO sub-links, with the former following the Nakagami-m
fading model and the latter adopting a Gamma-Gamma distribution considering atmospheric turbulence and
pointing error. Subsequently, calculating the first-hop security interruption probability of the ground source-UAV
relay link and the second-hop interruption probability of the UAV relay-
satellite link hop-by-hop, obtaining the end-to-end security interruption probability, and completing the
secure transmission performance evaluation. This method improves the evaluation accuracy and constructs a unified end-to-end analysis framework, providing a scientific basis for the design and parameter optimization of 6G air-to-ground communication systems.